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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 81 |
| 3 | 625 |
| 4 | 21025 |
| 5 | 314721 |
| 6 | 8071281 |
| 7 | 155975121 |
| 8 | 3685097025 |
| 9 | 79065004225 |
| 10 | 1832690505361 |
| 11 | 41201108978481 |
| 12 | 955863424195681 |
| 13 | 22002282841672225 |
| 14 | 513656632397480625 |
| 15 | 11987246142597870225 |
| 16 | 281793325930991748225 |
| 17 | 6636532731958908324225 |
| 18 | 156986802654088221500625 |
| 19 | 3721955785026092495600625 |
| 20 | 88512056987508595608293025 |
[1,1,81,625,21025,314721,8071281,155975121, 3685097025,79065004225,1832690505361, 41201108978481,955863424195681,22002282841672225, 513656632397480625,11987246142597870225, 281793325930991748225,6636532731958908324225, 156986802654088221500625, 3721955785026092495600625, 88512056987508595608293025] |